Use third-party viewController

Marinus

Hi all,

I am developing a drum machine for iphone/ipad and want to use Sparrow for the UI. I am an experienced C programmer, but consider myself a beginner in objective C (so, the app is mostly written in C). I would like to include Retronyms' audio copy/audio paste viewController to copy/paste audio fragments to and from other apps. I've tried starting the viewController from a Sparrow button callback like this:

(void)onTestButton:(SPEvent *)event
{
SPViewController *viewController = Sparrow.currentController;

NSString *fileToCopy = [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:@"snare1.wav"];

// create the AudioCopyViewController
AudioCopyViewController* audioCopyController = [[AudioCopyViewController alloc] initWithPath:fileToCopy];

[viewController presentViewController: audioCopyController animated:YES completion:nil];
}

which causes an "Application tried to push a nil view controller on target <UINavigationController" message. Logically, no sign of audiocopy/paste on the screen.

Is an approach as above possible? And if so, what needs to be changed?

Any help would be more than welcome!

Marinus

Shilo

Hello,

Try this:

- (void)onTestButton:(SPEvent *)event
{
NSString *fileToCopy = [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:@"snare1.wav"];

// create the AudioCopyViewController
AudioCopyViewController* audioCopyController = [[AudioCopyViewController alloc] initWithPath:fileToCopy];

[Sparrow.currentController.view addSubview:audioCopyController.view];
}

Marinus

Thanks @Shilo for your suggestion!

Unfortunately, the same error message appears in Xcode's debug area.

There is a difference in behavior between the two tested scenarios:

presentViewController-case: the Sparrow button disappears, the screen turns black except for a white bar at the top

addSubView-case: the Sparrow button remains on screen

Any other suggestion I could try?

Marinus

Shilo

Since the error is regarding a UINavigationController, I assume the problem is not within the code you provided. Do you initialize and setup a UINavigationController elsewhere? If not, maybe the AudioCopyViewController code is the culprit.

humble

I am using an older version of sparrow, but when I present the mapi audio copy 2.0 viewcontroller I first create a blank viewcontroller and add that as a subview on stage native view, then present ACP with an animation on that blank viewcontroller. Now, I think in the new sparrow there is no stage native view but a simillar approach might work.

ERik

Marinus

Thanks for your suggestions!

@ERik: I've tried a lot of variations along the line of your suggestion, but so far, still no success. But I am not giving up yet..

In the meantime, I've addressed my question also to the developers of audio copy/paste..

Thanks again!

Marinus

JackSparrow

@Marinus: I am currently experiencing the same problem as you were
did you ever get to solve it or find the problem?

Any help will be appreciated.

Shilo

@JackSparrow

Hello, try logging the "AudioCopyViewController" controller to make sure it isn't nil. If it is nil, the problem isn't related to Sparrow. Also, have you tried the code in a sample project that is not using Sparrow?